Well pumping apparatus for polluted water

ABSTRACT

A well pumping apparatus for polluted water is disclosed wherein a housing portion is fixedly arranged within the wall. A removable portion, comprising an electric motor, a motor housing and an impeller, is arranged to sealingly engage the fixed housing portion with the well to define a pumping chamber.

[ 1 WELL PUMPING APPARATUS FOR lPOlLLUTED WATER Louris Bood, Rodenrijs,Netherlands Mowid Anstalt, Vaduz, Liechtenstein Filed: Sept. 22, 1971Appl. No.: 182,806

Inventor:

Assignee:

US. Cl ..417/360, 415/201 Int. Cl ..F04d 29/40 Field of Search..4l7/360, 358, 424; 415/201 References Cited UNITED STATES PATENTS3,234,885 Englesson 4l7/36O lM3l'Ch 13, 1973 3,635,606 l/l972 Blum..417/360 Primary Examiner-Carlton R. Croyle Assistant Examiner-RichardJ. Sher Attorney-Carroll B. Quaintance et al.

[57] ABSTRACT A well pumping apparatus for polluted water is disclosedwherein a housing portion is fixedly arranged within the wall. Aremovable portion, comprising an electric motor, a motor housing and animpeller, is arranged to sealingly engage the fixed housing portion withthe well to define a pumping chamber.

5 Claims, 1 Drawing Figure a gl WELL PUMPING APPARATUS FOR POLLUTEDWATER The invention relates to a well pumping apparatus for pollutedwater, comprising a well with one or more supply openings for thepolluted water and a discharge line for the water to be pumped and apump device, consisting of a portion fixedly arranged within the welland comprising a pump housing provided with a suction opening at thelower side, which is in connection with the polluted water collected inthe well and provided with the discharge line, and of a portion which isremovable from the well and which comprises an electric motor, a motorhousing surrounding this motor and an impeller, torque-flow impeller (inGerman Wirbelrad) or propeller extending beyond this housing. Such anapparatus is known from German Auslegeschrift 1.190.794 especially theembodiment of FIG. 2. According to this embodiment the pumping apparatusis divided into two portions, so that it is possible to combine oneportion with different other portions. In this known apparatus thesealing between the two portions takes place by conical surfaces,whereby the pressure of the liquid to be pumped tries to raise theremovable portion, so that the sealing can be broken. Further the liquidto be pumped is discharged directly from the pump housing, withoutcontact with the motor housing, so that liquid cannot be used forcooling the electric motor.

The present invention is based on the idea that a pumping apparatus forpolluted water, such as sewage water, has to be inspected after acertain operation time in order to see whether certain parts have to becleaned, renewed or repaired. These parts are the electric motor, thebearings of the pump and motor shaft, the seals and the impeller,torque-flow impeller (in German Wirbelrad) or propeller.

According to the present invention only that portion of the pumpingapparatus is lifted from the well which contains said parts. In this waymuch greater apparatuses can be used without the requirement of a verygreat lifting device.

This is reached according to the present invention in that the fixedlyarranged portion further comprises a vertical surrounding shell, abovethe pump housing, the open upper end of which leads to the lower end ofthe shell, which shell at or in the vicinity of the upper end closed bya cover is provided with a connection for the discharge line, andwhereby the removable portion further comprises a plate substantiallyperpendicular to the pump axis, which plate all around is connected withthe motor housing and cooperates in a sealing way with the upper end ofthe pump housing in order to seal this pump housing at the upper sideexcept an opening in the plate, which forms the discharge openingandwhich connects the space within the pump housing with the spacewithin the shell.

The sealing between both portions is formed by the plate and the upperend of the pump housing, whereby the delivery pressure of the water doesnot affect the sealing, because this pressure is discharged through thedischarge opening in the plate.

The motor housing is cooled by the flowing water, so that the capacityof the electric motor can be lower than without cooling.

Further advantages and features of the present in vention will be clearfrom the following description and from the claims.

The invention will be explained with reference to the drawing, in whicha longitudinal section of the well pumping apparatus according to thepresent invention is shown.

The well consists in a known way of a concrete casting with sidewalls l,a bottom 2 and an upperwall 3. The cross-section form of the well isgenerally rectangular. On one or more of the sidewalls 1 a supply line 4is connected. Thus the water is collected in the lower part of the well.

The discharge line 5 for the water to be pumped extends through anopening in the sidewall of the well and is connected with a stub 6 of apreferably cylindrical shell 7, which is permanently fixed in the welland fits in the opening in the upperwall 3.

At the upperside this shell is closed by a cover 8, connected with theshell by bolts or the like.

On the lower end of the shell the pump housing is connected, which haspreferably the form of a snailshell, and which can be made from metalsheet with a bottom plate 9 and a spiral-shaped upright 10.

A suction housing 11 is connected to this bottom plate 9, which suctionhousing is provided with one or more inlet openings 12, while in thebottom plate 9 a central suction opening 13 is present. The suctionhousing 11 rests on the bottom 2 of the well and in this way also thepump housing 9, l0 and the shell 7 are resting on the bottom.

The shell 7 projects beyond the sidewall 10 of the pump housing, so thata flange is formed.

The shell 7, the pump housing 9, 10 and the suction housing 11 form thefixed portion of the pumping apparatus. Between the lower end of theshell 7 and the upper end of the sidewall 10 an annular connecting plate14 is arranged, preferably by welding connected to the shell 7 and thesidewall 10.

The removable portion of the pumping apparatus comprises a motor housing15 with therein an electric motor not shown and a pump impeller,torque-flow impeller or the like, indicated with 16, projecting beyondthe motor housing 15. The pump can also be carried out as a screw pump.

In the motor housing 15 bearings are arranged in a known way for themotorshaft 17, on its end the impeller or the torque-flow impeller ispresent.

Between the impeller or the torque-flow impeller 16 and the motorhousing 15 seals are present against polluted water (not shown).

A plate 18 is connected to the lower end of the motor housing 15, whichplate is fixed all around, for instance by bolts, against a flange ofthe motor housing 15.

When the removable portion of the pumping apparatus is resting on thefixed portion, this plate 18 forms the upper wall of the pump housing 9,10.

In the plate there is a deliver opening 19.

The removable portion of the pumping apparatus has a sufficient weightto form a sealing between the upper edge of the upright wall 10 and theplate 18.

As appears from the drawing the plate 18 fits with some clearance withinthe shell 7. By the fact that the pump housing is preferably in the formof a snail-shell, as usual at centrifugal pumps, the plate 18 projectsat the left side of the drawing further beyond the upper edge of theupright wall than at the right side in the drawing. In this waysufficient space'is formed for arranging a slot-shaped opening in theplate 18, through which with some clearance a vertical rod or strip 21is extending. This rod or strip is fixedly arranged in the well andserves as guiding at lowering and raising of the removable portion ofthe pumping apparatus and prevents that this portion rotates withrespect to the fixed portion if the motor is started.

The cable for supplying electric energy to the motor is indicated with22, which cable via a cable channel 23 is further connected to an energysource.

The removable portion of the pumping apparatus is via an eye 24 and achain 25 connected to a hook 26 on the cover 8.

After removing this cover 8 the chain 25 can be released from the hook26 and can be connected with the lifting hook of a pulley block or thelike, which is supported by a gin, which gin is arranged above the well,so that the removable pump portion can be removed from the well by meansof the chain. It is not necessary to enter the well. After inspectionthe pump portion is lowered again into the well and the cover 8 isclosed again.

The water flowing through the line 4 is collecting in the well. If acertain level is reached, the electric motor is started, by which thiswater comes in the pump housing via the openings 12 and 13. In this pumphousing in a known way the pressure is increased, so that the water isdelivered upwardly via the discharge opening and is removed via thedischarge line 5. During operation the electric motor is cooled by thewater flowing along the motor housing. In this way a smaller motorcapacity can be applied, then would be necessary without this cooling.So in this way the pump capacity is increased compared with the weightto be lifted.

1 claim:

1. Well pumping apparatus for polluted water, comprising a well with oneor more supply openings for the polluted water and a discharge line forthe water to be pumped and a pump device, consisting of a portionfixedly arranged within the well and comprising a pump housing providedwith a suction opening at the lower side, which is in connection withthe polluted water collected in the well and provided with a dischargeopening, and of a portion which is removable from the well and whichcomprises an electric motor, a motor housing surrounding this motor andan impeller extending beyond this housing, characterized in that thefixedly arranged portion further comprises a vertical surrounding shell,above the pump housing, the open upper end of which leads to the lowerend of the shell, which shell at or in the vicinity of the upper endclosed by a cover is provided with a connection for the discharge line,and whereby the removable portion further comprises a platesubstantially perpendicular to the pump axis, which plate all around isconnected with the motor housing and cooperates in a sealing way withthe upper end of the pump housing in order to seal this pump housing atthe upper side except for an opening in the plate, said opening formingthe discharge opening connecting connects the space within the pumphousing with the s ace within the shell.

2. Wel pumping apparatus according to claim 1,

characterized in that the upper end of the pump housing is arranged atsome distance from the lower end of the shell, so that an upright flangeis formed, with which the lower surface of the plate cooperatessealingly, which plate fits with some clearance within the shell.

3. Well pumping apparatus according to claim 1, characterized in thatwith the lower surface of the pump housing a suction housing isconnected, which rests directly on the bottom of the well, so that theremovable portion of the pumping apparatus is indirectly supported bythe bottom of the well.

4. Well pumping apparatus according to claim 1, characterized in thatmeans are present for preventing rotation of the removable portion ofthe pumping apparatus with respect to the fixedly arranged portion.

5. Well pumping apparatus according to claim 4, characterized in thatsaid means comprise an upright extending rod or the like, arrangedagainst or in the vicinity of the shell at its inner side and within anopening in the plate.

I! C I

1. Well pumping apparatus for polluted water, comprising a well with oneor more supply openings for the polluted water and a discharge line forthe water to be pumped and a pump device, consisting of a portionfixedly arranged within the well and comprising a pump housing providedwith a suction opening at the lower side, which is in connection withthe polluted water collected in the well and provided with a dischargeopening, and of a portion which is removable from the well and whichcomprises an electric motor, a motor housing surrounding this motor andan impeller extending beyond this housing, characterized in that thefixedly arranged portion further comprises a vertical surrounding shell,above the pump housing, the open upper end of which leads to the lowerend of the shell, which shell at or in the vicinity of the upper endclosed by a cover is provided with a connection for the discharge line,and whereby the removable portion further comprises a platesubstantially perpendicular to the pump axis, which plate all around isconnected with the motor housing and cooperates in a sealing way withthe upper end of the pump housing in order to seal this pump housing atthe upper side except for an opening in the plate, said opening formingthe discharge opening connecting connects the space within the pumphousing with the space within the shell.
 1. Well pumping apparatus forpolluted water, comprising a well with one or more supply openings forthe polluted water and a discharge line for the water to be pumped and apump device, consisting of a portion fixedly arranged within the welland comprising a pump housing provided with a suction opening at thelower side, which is in connection with the polluted water collected inthe well and provided with a discharge opening, and of a portion whichis removable from the well and which comprises an electric motor, amotor housing surrounding this motor and an impeller extending beyondthis housing, characterized in that the fixedly arranged portion furthercomprises a vertical surrounding shell, above the pump housing, the openupper end of which leads to the lower end of the shell, which shell ator in the vicinity of the upper end closed by a cover is provided with aconnection for the discharge line, and whereby the removable portionfurther comprises a plate substantially perpendicular to the pump axis,which plate all around is connected with the motor housing andcooperates in a sealing way with the upper end of the pump housing inorder to seal this pump housing at the upper side except for an openingin the plate, said opening forming the discharge opening connectingconnects the space within the pump housing with the space within theshell.
 2. Well pumping apparatus according to claim 1, characterized inthat the upper end of the pump housing is arranged at some distance fromthe lower end of the shell, so that an upright flange is formed, withwhich the lower surface of the plate cooperates sealingly, which platefits with some clearance within the shell.
 3. Well pumping apparatusaccording to claim 1, characterized in that with the lower surface ofthe pump housing a suction housing is connected, which rests directly onthe bottom of the well, so that the removable portion of the pumpingapparatus is indirectly supported by the bottom of the well.
 4. Wellpumping apparatus according to claim 1, characterized in that means arepresent for preventing rotation of the removable portion of the pumpingapparatus with respect to the fixedly arranged portion.